Round straightener



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atented 12, 1931 PATENT OFFICE GEORGE A. WISE, F PITTSBURGH,PENNSYLVANIA, ASSIGNOR TO SUTTON ENGINEER- ING' COMPANY, A CORPORATIONOF PENNSYLVANIA ROUND STRAIGHTENER Application filed October 1, 1929.Serial No. 396, :130.v

This invention relates to a round-straightening machine.

The ty e of straightening machine embodying the eatures of the resentinvention is that of a cross-roll straightener comprising pairs ofcontoured driven and contoured idler rolls with an intermediate pressureroll. In machines of this type, when designed for use with stock ofrelatively great diameter, as, for example, tubes of a diameter fromeight to eighteen inches, the adjustment of the idler rolls toward thedriven rolls to accommodate stock of the smaller diameters presents aroblem. If, for example, the idler roll brackets are moved from aposition for eighteen-inch stock to a position for eight-inch stock,independent adjustment of the idler roll brackets leaves a materialoverhang, that is, a relatively great distance throughout which theidler roll brackets are not directly supported. In such position of theidler roll brackets the rigidity of the machine is impaired withconsequent obvious disadvantages.

One object of the invention is to provide a round-straightening machineof the type indicated, in which the idler roll brackets are mounted in acommon frame, and this frame is made adjustable as a whole toward andaway from the driven rolls, thus avoiding excessive overhang of theidler roll brackets and minimizing independent adjustment thereof.

Another object of the invention is to provide independent fineadjustment of each of the idler roll brackets in the idler roll framecommon to all of them, thus permitting an accommodation between steps ofadjustment of the idler roll frame and permitting the idler rollsindependently to be arranged conformably to the condition of the stockbeing run.

In the accompanying drawings Figure 1 is a plan view of the machine as awhole; Figure 2 is an end elevation thereof; and Figure 3 is a verticalsectional view through the machine on the line IIIIH of Figure 1.

In the accompanying drawings the reference numeral 1 designates thedriven rolls of the machine, which, it is to be understood, are

.mounted in fixed lateral and vertical position; and reference numeral 2designates the co-operating idler rolls which must be adjusted towardand from the driven rolls, to accommodate stock of various diameters.The intermediate pressure roll is designated by the reference numeral 3.

The idler roll side frame 4 is a continuous structure which is providedadjacent the lower edges thereof with faces 5 arranged to slide onshelves 6 in the end stands 7 of the machine. Slidingmovement of theidler roll frame in the end stands may be produced by any suitablemeans, such as jack screws (not shown) [he idler roll frame is securedin adjusted position against movement longitudinally of the machine bymeans of bolts 8 passing through (Io-operating bolt holes 9 and 10 inthe idler roll frame 4 and end stands 7, respectively. While the bolts 8prevent longitudinal displacement of the idler roll frame and define thetransversely adjusted position of the frame, it is necessary to providesuitable backing means to support the frame transversely of the machineduring its use in the straightening, polishing or rounding of stock.Unless the jack screws for adjusting the idler frame toward and from thedriven rolls be of particularly great size and strength, in order tofulfill this purpose, it is desirable to provide special backing means,such as the means shown.

The special backing means, as shown, comprise a plurality of fillerblocks 11 formed integral with angular arms 12 which are pivoted to theend stands 7. Each of the filler blocks 11 is of a width correspondingto the distance between the centers of adjacent bolt holes. Duringadjustment of the idler frame the filler blocks 11 are swung backwardlyout of position. When the idler frame has been adjusted, and the bolts 8have been inserted and fastened down, one or more of the filler blocks11 is swung into position to fill the space between the outer end of theidler roll frame 4 and the side frame proper 13 of the machine.

Each of the brackets 14 for the co-operating idler rolls 2 and the idlerconstituting the intermediate pressure roll 3 are slidable Kidtransversely of the idler roll frame 4, and of the machine as a whole.As shown in section in Figure 3 of the drawings, the brackets 14 areslidable on the idler roll frame and are held firmly in adjustedposition therein by means of pressure screws 15 passing through caps orcover plate 16. Transverse sliding movement of the idler roll brackets14, to effect their independent adjustment is produced by means of jackscrews 17 With the arrangement of the present invention the idler rollframe 4: as a whole is moved transversely on the end stands 7, to effecta rough adjustment for the diameter of the stock to be operated on. Itis held in this adjusted position by means of bolts 8, and supportedagainst forces 0 erating transversely of the machine by suitable means,such as the filler blocks 11. A fine adjustment to supplement the roughadjustment between adjacent bolt holes and to permit proper relativepositioning of the idler rolls 2 co-operating with the driven rolls 1,and the intermediate pressure roll 3, is effected by the inv dependentadjustment of the brackets of each of these idler rolls. The rigidity ofthe machine is thus increased without sacrifice of fine adjustment.

What I claim is: I

In a cross roll straightening machine the combination of driven rollsstationary as to linear movement, idler rolls, an idler roll mountingframe common to all the idler rolls and movable toward and from thedriven rolls for rough adjustment of the idler rolls relatively thereto,an individual mounting bracket for each idler roll mounted in the framefor movement therein in the plane of move ment of the frame and supportthroughout against forces acting angularly to its path of movement, andmeans for producing independent movement of each of the idler rollbrackets in the frame to effect a fine adjustmelmt of the idler rollsrelatively to the driven ro s.

In testimony whereof I have hereunto set my hand.

GEORGE A. WISE.

